Sodium hypochlorite producing system

Abstract

One aspect of the present invention provides a sodium hypochlorite producing system, which includes: a first means configured to obtain saturated salt water and purified water; a second means including a anode chamber and a cathode chamber which are partitioned by a separator, the anode chamber allowing the saturated salt water to be converted into a anodic product including chlorine gas and anodic water, and the cathode chamber allowing the purified water to be converted into a cathodic product including sodium hydroxide, hydrogen gas, and hydroxide ions (OH−); a third means configured to react the anodic product and the cathodic product to produce a mixture including sodium hypochlorite and hydrogen gas; and a fourth means configured to prevent the sodium hydroxide or hydroxide ions (OH−) of the cathodic product or a combination thereof from moving to the anode chamber through the separator.

1 . A sodium hypochlorite producing system comprising:
 a first means configured to obtain saturated salt water and purified water;   a second means including a anode chamber and a cathode chamber which are partitioned by a separator, the anode chamber allowing the saturated salt water to be converted into a anodic product including chlorine gas and anodic water, and the cathode chamber allowing the purified water to be converted into a cathodic product including sodium hydroxide, hydrogen gas, and hydroxide ions (OH − );   a third means configured to react the anodic product and the cathodic product to produce a mixture including sodium hypochlorite and hydrogen gas; and   a fourth means configured to prevent the sodium hydroxide or hydroxide ions (OH − ) of the cathodic product, or a combination thereof from moving to the anode chamber through the separator.   
     
     
         2 . The sodium hypochlorite producing system of  claim 1 , wherein the third means allows the anodic product and the cathodic product to react in-situ. 
     
     
         3 . The sodium hypochlorite producing system of  claim 1 , wherein the separator has permeability to cations. 
     
     
         4 . The sodium hypochlorite producing system of  claim 3 , wherein a surface of the separator facing the cathode chamber has a blocking property against anions. 
     
     
         5 . The sodium hypochlorite producing system of  claim 4 , wherein a surface of the separator facing the cathode chamber has a cation-exchange functional group. 
     
     
         6 . The sodium hypochlorite producing system of  claim 5 , wherein the cation-exchange functional group is a carboxyl group, a sulfonic acid group, or a combination thereof. 
     
     
         7 . The sodium hypochlorite producing system of  claim 1 , wherein the fourth means includes:
 a temperature sensor configured to measure a temperature of the anodic product, the cathodic product, or a combination thereof; and   a heat exchanging means configured to control a temperature of the anode chamber, the cathode chamber, or a combination thereof according to a signal of the temperature sensor.   
     
     
         8 . The sodium hypochlorite producing system of  claim 1 , wherein the fourth means includes:
 a conductivity sensor configured to measure a conductivity of the anodic product, the cathodic product, or a combination thereof; and   a flow rate control means configured to control an amount of the saturated salt water, the purified water, or a combination thereof, which are injected into the second means, according to a signal of the conductivity sensor.   
     
     
         9 . The sodium hypochlorite producing system of  claim 1 , wherein the fourth means includes:
 an ORP sensor configured to measure an oxidation-reduction potential of the anodic product, the cathodic product, or a combination thereof; and   a flow rate control means configured to control an amount of the saturated salt water, the purified water, or a combination thereof, which are injected into the second means, according to a signal of the ORP sensor.   
     
     
         10 . The sodium hypochlorite producing system of  claim 1 , wherein the third means further includes a gas-liquid separating means configured to separate and discharge hydrogen gas from the mixture.